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Each piece starts with the failure mode of a category, not a product list. Newest first.
153 articles
Duty rating is the total load a ladder is designed for, not your body weight. Add boots, a tool belt and a bucket of tiles and a comfortable margin disappears.
A click torque wrench is a calibrated spring. Leave it wound to 60 Nm in a drawer for a year and it is no longer a 60 Nm wrench, and nothing about it will tell you.
Fountains attract some cats to drink more, though the hydration studies are mixed. They also grow biofilm in places you cannot see and fail when the pump silts up — which is a weekly job, not an occasional one.
A collar is fine for a dog that does not pull and a real risk for one that does. A harness fixes that and introduces a different failure — escape — which is entirely about fit.
Cats that stop using a litter box are usually not being difficult. The box is frequently too small, too covered or too few — and all three are fixable for very little money.
Every chew toy eventually fails. The question that decides whether that is a nuisance or a vet bill is what shape the pieces are when it does.
The underlying science is real and the consumer devices are frequently far weaker than anything tested. The gap between the study and the mask is where the money goes.
Cartridge handles are given away because the cartridges are where the money is. Over ten years the difference between systems runs into hundreds.
A toothbrush handle is discounted to almost nothing several times a year. The heads never are — and over five years they cost several times what the handle did.
SPF 50 is tested at 2 mg per square centimeter. Studies of real use repeatedly find people apply a quarter to a half of that — and protection falls at least as fast as the amount does.
A helmet absorbs an impact by destroying itself. The shell springs back and the foam underneath does not — so a helmet that looks perfect after a crash may have nothing left to give.
The words are used interchangeably in shops and they mean different things. A filter stops bacteria and protozoa; viruses go through it. Where that matters depends on geography.
